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The “liar, liar pants on fire” argument usually isn’t the most effective. But when it comes to guns, President Obama is lying through his teeth.

On Thursday, while on a visit to Mexico, the president continued his Blame America First tour. “This war is being waged with guns purchased not here but in the United States,” he said, referring to the drug wars that are tearing apart our neighbor to the south. “More than 90 percent of the guns recovered in Mexico come from the United States, many from gun shops that lay in our shared border.”

It is completely untrue that 90 percent of guns recovered in Mexico are from America. The Mexican government separates guns it confiscates that were made in the United States and sends them here to be traced. U.S. weapons are easy to identify because of clear markings.

Of the ones sent here to be traced, 90 percent turn out to be from America, but most guns recovered in Mexico are not sent here so are not included in the count. Fox News reported that 17 percent is a more accurate number.

Democrats aren’t alone in repeating phony gun statistics. The New York Times, CNN and numerous networks continue to repeat the 90 percent figure with no reporting to back it up. The hysteria is used to create the notion that a major problem exists with American guns - and Mr. Obama is anxious to step in to solve that problem with a $400 million program to stop U.S. guns from going to Mexico. That initiative would include clampdowns on U.S. gun shops.

It is ridiculous for Mr. Obama to blame Mexico’s lawlessness on Americans as if the longstanding corruption of Mexican elected officials, judges and law-enforcement officers has nothing to do with it.

One of the root causes of corruption is low pay. Mexican police earn $460 a month, sometimes less, which makes bribes hard to resist. There are about 350,000 policemen in Mexico. The $400 million Mr. Obama has promised for his anti-gun program could raise the annual salary of every Mexican cop by $1,143, a 21 percent increase. But the president wouldn’t be interested in that because his real agenda is to pursue gun control here at home.